Manual
Your beacon has the ability to perform 2 different tests to 
ensure the beacon is working perfectly. The first is a basic self 
test which checks the beacons Data Integrity and Memory; 406 
MHz Synthesizer; RF Power/Battery; GPS header and sends a 
satellite burst. The second test is a GPS Self Test that actually 
turns the GPS Receiver on, downloads your position and then 
transmits this data in the Self Test satellite burst.  
Note: Self test should only be performed in the first 5 minutes of 
any hour. 
Basic Self Test (No GPS Data) 
During a Self-test your beacon will send a 406 MHz signal coded 
as Self-test to the satellite system and a 121.5 MHz homing 
signal. 
This beacon has enough excess battery life to perform 60 self 
tests over the 5 year life of the battery. 
To perform a Basic Self Test: 
1. Unclip the antenna latch from the case. 
2. Move the antenna into the upright position 
3. Depress the Test button for 1 full second 
A Green Light will flash followed by a Second Long Green Light 
flash and the strobe light. This indicates a successful Basic Self 
Test.  
If a red LED flashes at the completion of the Self-test, your 
beacon has failed. Repeat the Self-test. If the failure persists, 
contact ACR Electronics or an authorized Battery Replacement 
Center for servicing of your beacon. 
Light Scheme 
Light Meaning 
Self Test Passed 
Self Test Passed 
(Battery: <24 Hours) 
Self Test Fail 
Self Test Fail 
(Battery: <24 Hours) 
Battery Fail 
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6. Testing Your Beacon 
ACR strongly recommends performing the Self-Test 
once per month, or at least two weeks prior to a trip 
allowing enough time for service should your beacon 
require it. 
Battery Witness Seal Life 
If your beacon flashes an initial Amber light at the 
beginning of the Self- test, this indicates that your 
electronic witness has been broken and you have used 
more than 1 hour of battery life. While the beacon will still 
operate normally in a distress situation, ACR strongly 
recommends you have your battery replaced and the 
electronic witness reset to ensure that you will have at 
least 24 hours of battery power. 










